If possible, please post a pic of one of the leaves. The closest I have gotten to an ID for your hoya is sp. AH-0240, but that is based upon the flowers and what I can see of the leaves.

Here is a link that might be useful: AH-0240

Here's a picture of the leaves. Actually I just found a pic on the web while looking for pictures of the leaves on the AH-0240, and I think my plant is H. australis. What do you think?

Thanks,
Emily

That is an australis! The leaves give it away.

Yeah, australis. There are several subspecies though, with rather different looking leaves. Are these sort of thick and fuzzy (pubescent) on both sides? If so, it's likely H. australis ssp. australis.